Suzuki Swift User Manual page 231

DTC P0340 CAMSHAFT POSITION (CMP) SENSOR CIRCUIT
MALFUNCTION
CIRCUIT DESCRIPTION
Signal rotor
on Camshaft
DTC DETECTING CONDITION
D No CMP sensor signal during engine running
(CKP sensor signal is inputted).
Reference
Connect oscilloscope between terminals C01-11 of ECM (PCM) connector connected to ECM (PCM) and body
ground and check CKP sensor signal.
Oscilloscope Waveforms
DTC CONFIRMATION PROCEDURE
1) Clear DTC.
2) Start engine and keep it at idle for 1 min.
3) Select "DTC" mode on scan tool and check DTC.
ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-75
To ignition
Camshaft
switch
position
sensor
2 V / Div.
Crank
angle
180_
720_
Waveforms at specified idle speed
POSSIBLE CAUSE
D CMP sensor circuit open or short.
D Signal rotor teeth damaged.
D CMP sensor malfunction, foreign material being
attached or improper installation.
D ECM (PCM) malfunction.
20 ms / Div.